Azure Fortigate unable to ping jump server which is in same VNET

Ganesh Thorave 31 Reputation points
2022-05-31T06:57:36.823+00:00

Hello All,

I have encountered one issue ,we have implemented fortigate firewall in Azure.( IP address
We login to firewall through Virtual machine(jump server) (10.127.2.6)

When I try to ping from fortigate CLI to Jump server I am unable to do so.

Both Jump server and Fortigate firewall is in Same VNET

AZFW-FGT-A # get router info routing-table details 10.127.2.6

Routing table for VRF=0
Routing entry for 10.127.2.0/24
Known via "static", distance 10, metric 0, best
* vrf 0 10.127.1.1, via port2

Thanks
Ganesh

Azure Firewall
Azure Firewall
An Azure network security service that is used to protect Azure Virtual Network resources.
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Azure Virtual Network
Azure Virtual Network
An Azure networking service that is used to provision private networks and optionally to connect to on-premises datacenters.
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  1. ChaitanyaNaykodi-MSFT 25,846 Reputation points Microsoft Employee
    2022-06-01T21:39:32.313+00:00

    Hello @Ganesh Thorave , Thank you for reaching out.

    If understand it correctly you have a FortiGate firewall and Jump Server (VM) deployed in a Vnet and you are unable to ping the jump server from your FortiGate CLI. Typically in such scenarios the issue is due to a NSG blocking ICMP traffic you can follow steps mentioned below to troubleshoot this issue. To validate this point you can also perform a TCP ping and see if it is blocked.

    • Can you validate if a NSG at VM's NIC/Subnet level is not blocking any ICMP traffic? if it helps you can check out connection troubleshoot in Azure Network Watcher to help pin-point the issue to any specific NSG rule.
    • You can also check whether your VM's OS firewall is not blocking ICMP traffic. For Windows OS you can run New-NetFirewallRule –DisplayName "Allow ICMPv4-In" –Protocol ICMPv4 command to enable ICMP traffic.
    • If possible, you can also perform a packet capture to help pin-point this issue.

    Hope this helps! Please let me know if the issue still persists. Thank you!

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